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1811. The prenatal technique used to see an image of the growing foetus in the womb is called
A. Radiotherapy
B. X-ray marking
C. Ultrasound
D. Amniocentesis
Explanation:
1812. Insects that make a clicking sound are
A. flies
B. crickets
C. beetles
D. cockroaches
Explanation:
1813. Poison glands of snakes are homologous to
A. stings of rays
B. salivary glands of vertebrates
C. electric organs of fishes
D. sebaceous glands of mammals
Explanation:
1814. Which of the following is the group with closely related animal types ?
A. Sea-star, Sea-lily, Sea-hare
B. Dog-fish, Silver-fish, Cray-fish
C. Leech, Louse, Snail
D. Jelly fish, Sea-fan, Sea-anemone
Explanation:
1815. In a bee-hive, there is a division of labour. Workers which collect honey from flowers are
A. males
B. females
C. sterile
D. intersexes
Explanation:
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